| backspace(back, return, slow, backward, reverse direction) |
| deteriorate(verb, drop, decline, reduce, fall) |
| fail(verb, drop, decline, fall, diminish) |
| get worse(verb, expression, idiom) |
| lapsing |
| retreat(noun, verb, decline, right, return) |
| weaken(verb, drop, decline, reduce, fall) |
| go back(verb, expression, phrasal verb, move, change) |
| oversight(noun, back, slow, backward, reverse direction) |
| relapsing |
| repetition(noun, decline, return, deterioration, weakening) |
| restoration(back, slow, backward, reverse direction, reversion) |
| retrograde(verb, drop, decline, fall, fail) |
| worsening(noun, drop, decline, fall, return) |
| collapse(noun, verb, drop, decline, reduce) |
| failure(noun, drop, fall, deterioration, spell) |
| sicken(verb, weaken, degenerate, deteriorate, revert) |
| slip back(verb, expression, phrasal verb, weaken, degenerate) |
| come back(verb, back, slow, backward, reverse direction) |
| degeneration(noun, drop, decline, fall, return) |